Regarding the frame drop issue in Tetris

As we all know, the ROG is a gaming phone. Even though the eighth generation isn't as good as many previous generations, it's not that bad either. However, none of the games I play have caused the ROG to drop frames.

But just now, I unlocked a mini-game called <Eliminate Blocks> (I think that's what it is?), and as soon as I started playing, the frame rate dropped so badly it made me question my existence…